Supabase vs Firebase Authentication: Which Should You Choose in 2026?
Choosing between Supabase and Firebase Authentication comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
By Toolradar Team · Last updated February 28, 2026 · Methodology
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
Supabase
Open source Firebase alternative
Best for you if:
- • You want the higher-rated option (9.0/10 vs 0.0/10)
- • You need api tools features specifically
- • Open-source Firebase alternative
- • PostgreSQL with real-time subscriptions
Firebase Authentication
Backend authentication by Google
Best for you if:
- • You need low-code backend features specifically
- • Backend authentication service
- • Multiple sign-in methods
| At a Glance |  Supabase |  Firebase Authentication |
|---|---|---|
Price | Free + Paid | Free + Paid |
Best For | API Tools | Low-Code Backend |
Rating | 90/100 | —/100 |
| Feature | Supabase | Firebase Authentication |
|---|---|---|
| Pricing Model | Freemium | Freemium |
| Editorial Score | 90 | — |
| Community Rating | No ratings yet | No ratings yet |
| Total Reviews | 0 | 0 |
| Community Upvotes | 0 | 0 |
| Categories | API ToolsLow-Code Backend | Low-Code BackendIdentity & Access |
How Supabase and Firebase Authentication Compare
Supabase
Open source Firebase alternative
Free tier available · 90/100 score
Firebase Authentication
Backend authentication by Google
Free tier available
Supabase is a api tools tool. Firebase Authentication is in low-code backend.
Who Should Use What?
On a budget?
Both are freemium. Compare plans on their websites.
Go with: Supabase
Want the highest-rated option?
Supabase scores 90/100. Firebase Authentication is unrated.
Go with: Supabase
Value user reviews?
Neither has user reviews yet.
Go with: Supabase
3 Questions to Help You Decide
What's your budget?
Both are freemium. Pricing won't help you decide here.
What's your use case?
Supabase is a api tools tool. Firebase Authentication is in low-code backend. Pick the category that matches your needs.
How important are ratings?
Not all tools have been rated yet.
Key Takeaways
Supabase
- Higher score: 90/100 vs unrated
- Free tier available
- Our pick for this comparison
Firebase Authentication
- Better fit for low-code backend
The Bottom Line
Supabase (90/100) is our pick.
Frequently Asked Questions
Is Supabase or Firebase Authentication better?
Supabase scores 90/100 in our evaluation. Both are freemium.
What are Supabase and Firebase Authentication used for?
Supabase: Open source Firebase alternative. Firebase Authentication: Backend authentication by Google.
What does Supabase cost vs Firebase Authentication?
Supabase is freemium (free tier + paid plans). Firebase Authentication is freemium (free tier + paid plans). Visit their websites for detailed pricing.